<!DOCTYPE html>
<html lang="en" dir="ltr">
  <head>
    <meta charset="utf-8">
    <title></title>
    <script src="http://localhost:8080/socket.io/socket.io.js" charset="utf-8"></script>
    <script>
    let sock=io.connect('ws://localhost:8080/');

    //sock.emit('aaa', 12, 5);
    sock.on('timer', time=>{
      console.log(time);
    });

    //sock.emit
    //sock.on
    </script>
  </head>
  <body>

  </body>
</html>
